My friend and I stayed here for 3 nights and we had a great time. The location is great, within a 5 min walk of several wats and the Great Swing and a 20 min walk from the Grand Palace and Emerald Buddha. There are tons of restaurants and bars within a few blocks. There were also lots of tuk tuks in the area, so getting anywhere further away was really easy. The AC was a lifesaver and the stained glass windows were beautiful in the morning.
One thing to note is that the two bedrooms are connected, and the bathroom is connected to the back bedroom. So it really felt like one very large bedroom with four beds. People sleeping in the front bedroom had to walk though the back bedroom to reach the bathroom. This was totally fine for our group, but worth being aware of in advance. Also, there is a refrigerator and microwave, but it is outside the unit and is shared with another unit in the building. Overall, great experience for a group of four friends staying for a few days in Bangkok.